An early Sunday morning fire at a Brooklyn religious school sent three firefighters and one civilian to the hospital with minor injuries, the FDNY said.

About 60 firefighters responded to 1462 56th Street at about 1:45 a.m. after the department got reports of flames and smoke on the first floor of a religious school, fire officials said.

They knocked the fire down in about an hour. Three firefighters and one civilian were brought to NYU Langone Hospital for minor injuries, officials said.

The cause of the fire was being investigated.